A ledge is similar to a shelf, being fairly narrow and horizontal. Ledges are generally built into a building, either for decoration or for practical reasons, like a windowledge.
Scientific name: phylum: annelida, subclass: hirudinea
Leeches are in the same family as earthworms. Not all leeches are bloodsuckers, but the ones people are most familiar with are. They grow to around 2-5cm long but some species reach 30cm. Leeches live in damp, swampy areas.
Leeches have adapted one end of them into a sucker, so they can attach to a host. They inject anaesthetic in as they bite, so the host cannot feel them, and then an anti-clotting agent so the host's blood flows freely. Leeches stay stuck to their host until they are full, then they drop off.
Scientific name: allium ampeloprasum var. porrum
Video: view
Left is a direction. The child in the picture is pointing left. The opposite direction to left is right.
Lego is a system of building blocks that come all sorts of shapes, sizes and colors. Lego can be used to make almost anything. While it is a children's toy, many adults enjoy playing with it too, or making full-size sculptures out of it.